# LMNT

**Canonical:** https://apis.io/providers/lmnt/  
**Website:** https://www.lmnt.com/  
**APIs profiled:** 4

LMNT is a text-to-speech API platform delivering ultra-low latency voice synthesis with streaming audio output designed for real-time conversational AI applications. The platform provides a Speech API for standard text-to-speech generation and a Speech Sessions API for WebSocket-based real-time streaming integrated with LLM pipelines, achieving latency under 300 milliseconds. LMNT supports 31 languages and offers voice cloning from as little as five seconds of audio, with its Blizzard 2 model optimized for accuracy, expressiveness, and pronunciation. Authentication uses API keys managed via the app dashboard, with SDKs available for Python, TypeScript, and Go.

## Kin Score — 46.5 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 46.5).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 60.3 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 57.9 |
| Access Clarity | 57.9 |

## Agent readiness — 35.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | verified |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (4)

- **LMNT Speech Sessions API** — WebSocket-based real-time speech generation API for streaming LLM text output to synthesized audio with reset-latency support for conversational AI applications requiring interr...
- **LMNT Ai API** — The Ai API from LMNT — 8 operation(s) for ai.
- **LMNT Health Check API** — The Health Check API from LMNT — 1 operation(s) for health check.
- **LMNT Speech API** — The Speech API from LMNT — 2 operation(s) for speech.

## Agentic access (1)

- **Lmnt Agentic Access** — 14 operations · 8 acting

## Security (3)

- **Lmnt Authentication** — apiKey · 1 scheme
- **Lmnt Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC
- **Lmnt Trust Center** — SOC 2

## Plans (1)

- **Lmnt Plans Pricing**

## Tags

Text-to-Speech, Voice Synthesis, Voice Cloning, Audio Streaming, Conversational AI, Low Latency, Real-Time Audio

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/lmnt/). Scores are computed from the provider's own public artifacts under a published rubric.